1 Ganglia-groups of neuron cell bodies that lie peripheral to the central nervous system in vertebrates. 2  Bipolar neurons-cell body located near the middle of the axon; characteristic of retinal neurons. 3  Unipolar neurons-cell body lies off to one side of axon; characteristic of sensory neurons.
The principal host for diamonds are rocks formed in the earth's mantle that are known as eclogite and peridotite that are carried to the earth's surface in magmas known as kimberlit e and lamproite.
Diamonds typically occur in a rock called Kimberlite and in related cousins (Lamproite). Although diamond crystals are found in Kimberlite and related rocks, the origin of diamond is more closely related to the fragments of peridotite and eclogite which are derived from the upper mantle, below cratonic (shield) areas.iamonds typically occur in a rock called Kimberlite and in related cousins (Lamproite). Although diamond crystals are found in Kimberlite and related rocks, the origin of diamond is more closely related to the fragments of peridotite and eclogite which are derived from the upper mantle, below cratonic (shield) areas.